Manufacture of coatings and the like artificial masses



Patented Dec. 4, I934 Wilhelm d wizshafen-on-the-Rhine, Ge

I G. Farbenindustrie Aktle Fran kto tlon of No Drawing.

No. 346,796. In

esters oi mono-ethers thereof, aralbl esters of phosphoric acid, 5esters and the like. For the rt-on-the-Main, Ge many, German alkylphthallc acid. above described var- Karl E lenmar Lndl'many, assixnoringesellsehatt,

a corpora- Punssan March 13, 1929, Sex-lg] man March 18, 1928 3 C aims.(01. 1344s) nishes may be used varnishes type, if desired containingApplication 01' the linseed oil g agents, such ing or the likemechanical operation.

The lacquers obtained in accordance with the above when dried on a subasmuch urea-formaldehyde condensation product as cellulose ester andlinsh. Moreover, the said surfaces are insulating purposes, or thelayers obtained is rather The following examples will the nature of thisinvention, sters, is not restricted to th are by weight.

since the disruptive strength high.

but the invention ese examples. The parts or an] or Example 1 18 partsor a 43 per cent solution 01' an artificial resin of urea andformaldehyde in isobutyl alcohol are mixed with a solution of 3 parts ofnitrocellulose and 6 parts of an oil varnishconsisting of about 66 partsof melted Congo copa1-, 33 parts of boiled linseed oil and 1 part ofcobalt'resinate in 10 parts of butyl acetate, 25 parts of ethyl alcoholand 35 parts of toluene. After 6 parts of the oily fraction boilingbetween 150 and 190 C. obtained by catalytic hydrogenation of oxides ofcarbon are added, the lacquer obtained produces clear and very hardfilms. The gum varnish may be prepared from China wood oil instead oflinseed oil.

Example 2 18 parts of the artificial resin solution in isobutyl alcoholdescribed in Example 1 are mixed with a solution of 6 parts ofnitrocellulose and 6 parts-of an oil varnish consisting of about 33parts of kaur'i copal, 66 parts of boiled linseed oil and 1 part ofmanganese resinate in the mixture of solvents described in Example 1. Tothe solution, so prepared, 6 parts of the di-isobutyl ester of phthalicacid are added. The lacquer obtained gives clear elastic and welladhering coatings. The phthalic acid ester may be replaced by phosphoricacid esters of phenols, for example, trlcresylphosphate.

Example 3 A solution of 60 parts of nitrocellulose in 60 parts of butylacetate, 120 parts of cyclohexyl acetate, 340 parts of ethyl alcohol and300 parts of toluene is treated with 60 parts of an oil varnishconsisting of equal parts of melted Zanzibar copal and boiled linseedoil with an addition of 1.5 per cent of cobalt resinate. After the oilvarnish has dissolved in the nitrocellulose solution, 140 parts of a42.6 per cent solution of a. condensation product of dimethylol-urea innormal butyl alcohol are added. After intimately mixing the ingredients,9, clear, transparent drying lacquer is obtained which is very stable towater. Instead ofthe aforesaid condensation product of dimethylol-urea asimilar product obtainable from a mixture of urea and thiourea, orthiourea solely, and formaldehyde or from dimethylol-thiourea may beemployed.

What we claim is:--

1. Homogeneous coating compositions comprising a resinous condensationproduct of a compound selected from the group consisting of urea andthiourea with formaldehyde, which condensation product is soluble in abutyl alcohol, a cellulose ester, a varnish derived from a drying oilcapable of forming non-melting films and selected from the classconsisting of linseedoiland China wood oil and a substantiallynon-volatile softening agent capable of dissolving each of the aforesaidsolid constituents.

2. Homogeneous coating compositions comprising a resinous condensationproduct of a compound selected from the group consisting of urea andthiourea with formaldehyde, which condensation product is soluble in abutyl alcohol, a cellulose ester, 9. varnish derived from linseed 0.1, asubstantially non-volatile softening agent capable of dissolving each ofthe aforesaid solid constituents and an organic solvent.

3. Homogeneous coating compositions comprising a resinous condensationproduct of a compound selected from the group consisting of urea andthiourea with formaldehyde, which condensation product is soluble in abutyl alcohol, a cellulose ester, a varnish derived from linseed oil, asubstantially non-volatile softening agent capable of dissolving each ofthe aforesaid solid constituents, a solvent, an organic diluent and adrier.

WILHEI-I'M PUNGS.

KARL EISENMANN.

